Fig. 8From: Triphenylphosphine-based functional porous polymer as an efficient heterogeneous catalyst for the synthesis of cyclic carbonates from CO2 FT-IR spectra of (a) fresh TPDB-BP-TEA and (b) reused TPDB-BP-TEA. FT-IR spectrum of the recovered catalyst suggests the well-preserved textural properties relative to the fresh one, accounting for its well recyclabilityBack to article page